CAJ | 학술논문

对包裹式加筋路堤进行了现场试验测试分析.试验分别对2种格栅类型、3种不同加筋间距等工况下的土压力、格栅应变、路堤沉降进行了跟踪观测,研究了加筋层数及加筋类型对路堤结构性能的影响.通过试验结果的比较分析发现,包裹式柔性支挡结构土压力受加筋形式及加筋率的影响,双向格栅在降低土压力方面作用更为显著,水平土压力在加筋路堤坡面处接近静止土压力,而加筋体后部则较接近朗肯主动土压力,其分布同时还受到加筋形式和加筋率的影响.应变沿格栅分布并不均匀且各层的分布规律也不尽相同;应变随时间持续会增大,且早期增长快.包裹式加筋对于早期沉降及冻胀的限制作用并不明显.试验显示了加筋路堤的真实工作状态,结果可为土工格栅加筋结构的后续研究和工程实践提供参考.
대포과식가근로제진행료현장시험측시분석.시험분별대2충격책류형、3충불동가근간거등공황하적토압력、격책응변、로제침강진행료근종관측,연구료가근층수급가근류형대로제결구성능적영향.통과시험결과적비교분석발현,포과식유성지당결구토압력수가근형식급가근솔적영향,쌍향격책재강저토압력방면작용경위현저,수평토압력재가근로제파면처접근정지토압력,이가근체후부칙교접근랑긍주동토압력,기분포동시환수도가근형식화가근솔적영향.응변연격책분포병불균균차각층적분포규률야불진상동;응변수시간지속회증대,차조기증장쾌.포과식가근대우조기침강급동창적한제작용병불명현.시험현시료가근로제적진실공작상태,결과가위토공격책가근결구적후속연구화공정실천제공삼고.
The results of field experiment of the geogrid reinforced embankments with wrapped face are reported.In these tests,the structural responses including earth pressure,strain of geogrid and settlement on pavement are investigated for the reinforced embankments with two geogrid types,three different reinforcement spacing and one district without reinforcement.Based on the contras analysis,it is found that the distribution of earth pressure behind the reinforced embankment is influenced both by reinforcement type and reinforcement ratio.The effect on the reducing of earth pressure is more obvious for bi-axial geogrid.The horizontal earth pressure behind the slope is close to the earth pressure at rest and that behind the reinforced body is close to the Rankine active earth pressure,and meanwhile its distribution is also influenced by the reinforcement type and reinforcement ratio.The distribution of strain along the geogrid is non-uniform and it is distinct for different layers.The strain increases with the time and the increase in the early stage is quick.Compared with the non-reinforced area,the conditions of reinforced embankment for the problem of early settlement and frost heaving are not improved.In general,this experiment reveals the embankment's real work condition,and the results shown here give a good reference for the succeeding research and the similar engineering.